Quick Answer What Is a SARS Tax Number and How Do I Get One? A SARS tax reference number is the unique number identifying a person or company to SARS. Companies receive one automatically when registered at CIPC. Individuals and sole proprietors register on eFiling or at a SARS branch with an ID and proof of address. What this means in plain language One number per taxpayer, for life – it follows you across jobs and businesses. A sole proprietor uses their personal tax number for the business; a company gets its own separate number. You need it everywhere: opening a business bank account, registering on eFiling, applying for Tax…